*{
    margin: 0;
    padding: 0;
}
.box{
    height: 1600px;
   background-image: linear-gradient(#c8cacb,#464646);
}
.rocket{
    width: 149px;
    height: 249px;
    position: fixed;
    top: 85%;
    right: 0%;
    background-image: url(../img/rocket_button_up.png);
}
.animation{
    animation:rocket 1s normal;
    animation-timing-function: steps(6);
}
@keyframes rocket{
    0%{
        background-position: 0 0;
        top: 85%;
        right: 0%;
    }
    50%{
      
        top: 55%;
        right: 0%;
    }
    100%{
        background-position: -892px 0;
        top: 0%;
        right: 0%;
    }
}